WARNING: kernel stack regs at 00000000b84faf47 in syz-fuzzer:7561 has bad 'bp' value 00000000abcf3186 unwind stack type:0 next_sp:00000000abcf3186 mask:0x20 graph_idx:0 000000007277a93f: fffffe0000037ab0 (0xfffffe0000037ab0) 0000000050ce307f: ffffffff81295f7a (__save_stack_trace+0x7a/0xf0) 0000000036653619: 0000000000000000 ... 000000004a8ceabf: fffffe0000036000 (0xfffffe0000036000) 00000000a94e8531: fffffe0000038000 (0xfffffe0000038000) 0000000040e4e1e1: ffff888088e76000 (0xffff888088e76000) 00000000c4007bb0: 0000000000000020 (0x20) 000000000f575a51: ffff888092cf05c0 (0xffff888092cf05c0) 00000000c5e151c2: 0000010100000000 (0x10100000000) 00000000984ecc72: 0000000000000000 ... 000000005df78d3d: fffffe0000037a20 (0xfffffe0000037a20) 00000000f2cd3fd6: ffffffff819811c4 (__dump_page+0x4/0xa00) 000000001319f80c: fffffe0000037f58 (0xfffffe0000037f58) 00000000a0819dd7: 7a58cb3672d56d00 (0x7a58cb3672d56d00) 000000000940fa92: fffffe0000037bf0 (0xfffffe0000037bf0) 00000000e2615745: ffffffff89dd6288 (stack_trace+0x174a68/0x400020) 000000005f4e0ccb: fffffe0000037bf4 (0xfffffe0000037bf4) 00000000fef301e5: dffffc0000000000 (0xdffffc0000000000) 00000000507ab7f0: fffffe0000037ac0 (0xfffffe0000037ac0) 0000000052e2d983: ffffffff8129600a (save_stack_trace+0x1a/0x20) 00000000ec01f536: fffffe0000037b00 (0xfffffe0000037b00) 00000000b3a85f0e: ffffffff8156bdf0 (save_trace+0xe0/0x290) 00000000a8bbee35: ffff888092cf0e68 (0xffff888092cf0e68) 00000000b31d0bbd: 0000000000000002 (0x2) 000000001984ba49: ffff888092cf0e68 (0xffff888092cf0e68) 0000000024a0307d: ffff888092cf0e88 (0xffff888092cf0e88) 00000000be40c2c6: dffffc0000000000 (0xdffffc0000000000) 000000005c53229d: ffff888092cf05c0 (0xffff888092cf05c0) 000000009af7c391: fffffe0000037ce0 (0xfffffe0000037ce0) 000000008140a163: ffffffff81576651 (__lock_acquire+0x32b1/0x4710) 00000000f3d6dbc3: 0000000000000000 ... 000000006bf79d2c: ffff888092cf05c0 (0xffff888092cf05c0) 00000000bf4f1cbb: 0000000000000002 (0x2) 0000000023297b19: ffffed101259e1d6 (0xffffed101259e1d6) 000000009ad34932: ffff888092cf0eb2 (0xffff888092cf0eb2) 000000000496b2bf: fffffe0000037bd0 (0xfffffe0000037bd0) 00000000092a9427: fffffe0000037c30 (0xfffffe0000037c30) 00000000ef5344b9: fffffe0000037bf0 (0xfffffe0000037bf0) 000000009c3ddeb4: ffffffff00000001 (0xffffffff00000001) 00000000d57becdf: ffff888092cf0e90 (0xffff888092cf0e90) 00000000993bbbbc: ffff888092cf0e30 (0xffff888092cf0e30) 00000000314dfb7e: 761318489821662e (0x761318489821662e) 00000000a7a8f331: ffff888092cf0eb0 (0xffff888092cf0eb0) 00000000f09867c2: ffff888092cf0e38 (0xffff888092cf0e38) 00000000608b9d56: ffff888092cf0e40 (0xffff888092cf0e40) 00000000c9951816: 1fffffc000006f76 (0x1fffffc000006f76) 00000000fed1a283: ffff888000000000 (0xffff888000000000) 000000001b1b0080: 0000000041b58ab3 (0x41b58ab3) 00000000cf69926d: ffffffff885c8f08 (ORMASK+0x62c8/0x13e694) 0000000099e92df1: ffffffff815733a0 (mark_held_locks+0xf0/0xf0) 000000004f74614f: ffffffff815738fd (__lock_acquire+0x55d/0x4710) 00000000ee3f0260: 0000000000000000 ... 0000000090e50595: 000516b300000009 (0x516b300000009) 0000000097ed3a44: ffffffff89dd6288 (stack_trace+0x174a68/0x400020) 000000000508a8ee: 0000000000000000 ... 000000007ea0a9a5: ffff888092cf0ea8 (0xffff888092cf0ea8) 00000000aa9d4053: ffff888092cf0e30 (0xffff888092cf0e30) 00000000eb4c3ae1: ffffffff8a0abe40 (lock_classes+0x2580/0x27fee0) 00000000a6d9b7e2: ffff888092cf0eb0 (0xffff888092cf0eb0) 000000009c178bbc: ffff888092cf0e38 (0xffff888092cf0e38) 000000003f133457: ffff888092cf0e40 (0xffff888092cf0e40) 000000004f8d084f: 1fffffc000006f8e (0x1fffffc000006f8e) 000000001cfe3a7d: 0000000000000000 ... 0000000093843883: 0000000041b58ab3 (0x41b58ab3) 00000000367deb09: ffffffff885c8f08 (ORMASK+0x62c8/0x13e694) 00000000f5f7c277: ffffffff815733a0 (mark_held_locks+0xf0/0xf0) 0000000013e504d5: 0000000000000000 ... 000000006fc501fd: 7a58cb3672d56d00 (0x7a58cb3672d56d00) 000000004316d6a5: 0000000000000000 ... 000000003161a12e: ffff888092cf05c0 (0xffff888092cf05c0) 00000000bd49aba3: ffffffff8899a5b8 (logbuf_lock+0x18/0x60) 000000006e598ece: 0000000000000000 ... 00000000a36ab241: fffffe0000037d58 (0xfffffe0000037d58) 00000000f5f4bd42: ffffffff81579baf (lock_acquire+0x16f/0x3f0) 00000000a98c4bcc: 0000000000000000 ... 0000000046ccb8c6: ffffffff815aaf39 (vprintk_emit+0xf9/0x6d0) 00000000346129fa: 0000000000000000 ... 00000000b8d6e369: fffffe0000037d50 (0xfffffe0000037d50) 00000000e7b31e17: 0000000000000001 (0x1) 0000000049c4ea24: 0000000000000082 (0x82) 00000000eb8423bc: 0000000000000000 ... 00000000209ce3b8: ffffffff8899a5a0 (log_wait+0x80/0x80) 000000009db545a6: ffffffff8767c060 (hpet_msi_domain_info+0xf20/0x1c00) 0000000093077a37: fffffe0000037e50 (0xfffffe0000037e50) 000000007cca092d: 0000000000000000 ... 000000000d05c080: fffffe0000037d78 (0xfffffe0000037d78) 0000000020b2d90a: ffffffff870baf2f (_raw_spin_lock+0x2f/0x40) 00000000217422b6: ffffffff815aaf39 (vprintk_emit+0xf9/0x6d0) 000000009ef7beb3: 00000000ffffffff (0xffffffff) 000000000dbc0493: fffffe0000037dd0 (0xfffffe0000037dd0) 000000009fe19b99: ffffffff815aaf39 (vprintk_emit+0xf9/0x6d0) 0000000000b001f3: 0000000000000000 ... 000000006acf3405: 00000000885c8b2c (0x885c8b2c) 000000003b3c4293: 0000000000000093 (0x93) 0000000065070106: ffffffff8767c060 (hpet_msi_domain_info+0xf20/0x1c00) 0000000077a2243b: fffffe0000037e50 (0xfffffe0000037e50) 00000000e189d82f: fffffe0000037e50 (0xfffffe0000037e50) 0000000039c3a24d: 0000000000000000 ... 00000000232d20d5: ffff888092cf05c0 (0xffff888092cf05c0) 000000005ad4c5c2: fffffe0000037df0 (0xfffffe0000037df0) 00000000747b2481: ffffffff815ab538 (vprintk_default+0x28/0x30) 00000000031bc625: 0000000000000000 ... 00000000182b64e6: ffffffff8767c060 (hpet_msi_domain_info+0xf20/0x1c00) 000000000b683eb9: fffffe0000037e20 (0xfffffe0000037e20) 0000000082fd5c05: ffffffff815ad78e (vprintk_func+0x7e/0x189) 00000000a3ec3615: 0000000000000008 (0x8) 00000000f2aed513: fffffbc000006fc6 (0xfffffbc000006fc6) 000000006ce34d65: ffffffff8767c060 (hpet_msi_domain_info+0xf20/0x1c00) 000000005fd62238: fffffe0000037ff0 (0xfffffe0000037ff0) 0000000054ae4be6: fffffe0000037ef0 (0xfffffe0000037ef0) 000000005d4c07c0: ffffffff815ac5fe (printk+0xba/0xed) 0000000029938954: 0000000041b58ab3 (0x41b58ab3) 000000009217d359: ffffffff885c9e6f (ORMASK+0x722f/0x13e694) 000000004c118f60: ffffffff815ac544 (kmsg_dump_rewind_nolock+0xe4/0xe4) 00000000c7fa9f0a: fffffe0000037f08 (0xfffffe0000037f08) 000000007a52f8ad: ffffffff00000008 (0xffffffff00000008) 000000001e3017d5: fffffe0000037f00 (0xfffffe0000037f00) 00000000cbc00d89: fffffe0000037eb0 (0xfffffe0000037eb0) 0000000009a2fa8c: ffffffff885c6e1a (ORMASK+0x41da/0x13e694) 00000000f9153fe2: ffffffff814c7760 (__atomic_notifier_call_chain+0x1a0/0x1a0) 00000000a9c2f588: ffff8880ae92de38 (0xffff8880ae92de38) 0000000037224035: fffffe0000037f58 (0xfffffe0000037f58) 00000000c510cc4c: ffffffff8764f700 (__func__.53933+0x7e0/0x7e0) 00000000e0fde2e7: 0000000000000000 ... 00000000816abae1: 0000000b00000008 (0xb00000008) 0000000071c3a529: fffffe0000037ff0 (0xfffffe0000037ff0) 0000000051f6e2b2: 7a58cb3672d56d00 (0x7a58cb3672d56d00) 0000000057f68f9c: ffffffff81a81281 (kasan_check_read+0x11/0x20) 00000000d3a611ca: 0000000000000000 ... 00000000195e8ae1: 1ffff1101259e336 (0x1ffff1101259e336) 00000000d6329b1e: 0000000000000000 ... 0000000000598221: ffff888092cf05c0 (0xffff888092cf05c0) 00000000f3eee744: 0000000000000003 (0x3) 00000000848eda49: fffffe0000037f58 (0xfffffe0000037f58) 00000000c22c6584: fffffe0000037f58 (0xfffffe0000037f58) 000000000231cf90: fffffe0000037f08 (0xfffffe0000037f08) 00000000f877938b: ffffffff812fcda8 (df_debug+0x15/0x3d) 00000000386081a4: 0000000000000000 ... 00000000e9f46469: fffffe0000037f48 (0xfffffe0000037f48) 000000003351fb07: ffffffff81266ce2 (do_double_fault+0x112/0x260) 0000000042b2bc34: 0000000000000000 ... 00000000331eba99: 0000000000000001 (0x1) 0000000077b1ae6c: 0000000000000000 ... 0000000080da6e70: fffffe0000037f59 (0xfffffe0000037f59) 0000000089c6c19b: ffffffff87200bb3 (double_fault+0x23/0x30) 00000000b84faf47: 0000000000000001 (0x1) 00000000cf4e0a6c: 0000000000000000 ... 0000000067c938c1: ffffffff87747c00 (__param_str_enabled+0xec0/0x15c0) 000000008572caf5: ffff88812fffca88 (0xffff88812fffca88) 000000005ee86e67: ffff888088e76000 (0xffff888088e76000) 0000000053e22aad: 00000000000000d0 (0xd0) 00000000ddbb6191: 0000000000000003 (0x3) 00000000d5ecf2c5: ffffed10112c4ebd (0xffffed10112c4ebd) 000000009c8c2530: ffffed10112c4ebe (0xffffed10112c4ebe) 00000000d5132d02: ffff888092cf05c0 (0xffff888092cf05c0) 000000003abd28b3: ffff888092cf05c0 (0xffff888092cf05c0) 00000000452a4271: ffffffff81a47923 (PageHeadHuge+0xb3/0x150) 0000000071f43a5a: 0000000000000000 ... 000000006d2c5dfc: ffffffff87747c00 (__param_str_enabled+0xec0/0x15c0) 00000000347937c7: ffff88812fffca88 (0xffff88812fffca88) 000000008491651b: ffffffffffffffff (0xffffffffffffffff) 000000005b8b98b0: ffffffff819811c4 (__dump_page+0x4/0xa00) 0000000075ab628a: 0000000000000010 (0x10) 00000000f36b6a9c: 0000000000010093 (0x10093) 000000002e021168: ffff888088e76000 (0xffff888088e76000) 00000000096df38d: 0000000000000000 ... PANIC: double fault, error_code: 0x0 CPU: 1 PID: 7561 Comm: syz-fuzzer Not tainted 5.0.0-rc7-next-20190225 #42 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__dump_page+0x4/0xa00 mm/debug.c:46 Code: 56 d8 ff 4c 89 ea be ff ff ff ff 4c 89 e7 e8 63 03 10 00 e8 3e 56 d8 ff 5b 41 5c 41 5d 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 <41> 57 41 56 41 55 41 54 49 89 fc 53 48 83 ec 18 48 89 75 c0 e8 13 RSP: 0000:ffff888088e76000 EFLAGS: 00010093 RAX: ffff888092cf05c0 RBX: 00000000000000d0 RCX: ffffffff81a47923 RDX: 0000000000000000 RSI: ffffffff87747c00 RDI: ffff88812fffca88 RBP: ffff888088e76000 R08: ffff888092cf05c0 R09: ffffed10112c4ebe R10: ffffed10112c4ebd R11: 0000000000000003 R12: ffff88812fffca88 R13: ffffffff87747c00 R14: 0000000000000000 R15: 0000000000000001 FS: 000000c42017c068(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888088e75ff8 CR3: 000000009aeca000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: