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WARNING in __virt_to_phys (4)

Status: upstream: reported C repro on 2024/07/04 10:10
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+53a6240f92421be04a12@syzkaller.appspotmail.com
Fix commit: 9bd01500e4d8 bcachefs: Fix freeing of error pointers
Patched on: [ci-qemu-upstream-386 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-net-next-test-gce ci2-upstream-usb], missing on: [ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu2-arm32 ci-qemu2-riscv64 ci-upstream-bpf-next-kasan-gce ci-upstream-net-this-kasan-gce]
First crash: 6d19h, last: 6d19h
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] WARNING in __virt_to_phys (4) 1 (2) 2024/07/04 22:06
▶ ▼ Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __virt_to_phys (2) ntfs3 C 2 424d 420d 0/27 auto-obsoleted due to no activity on 2023/08/23 09:02
linux-6.1 WARNING in __virt_to_phys origin:lts-only C done 1 415d 422d 3/3 fixed on 2023/06/19 12:27
linux-6.1 WARNING in __virt_to_phys (2) origin:lts-only C error 3 70d 71d 0/3 upstream: reported C repro on 2024/04/27 00:06
upstream WARNING in __virt_to_phys (3) bcachefs C 447 31d 64d 26/27 fixed on 2024/06/05 13:52
linux-5.15 WARNING in __virt_to_phys origin:lts-only C error 4 70d 419d 0/3 upstream: reported C repro on 2023/05/14 19:50
upstream WARNING in __virt_to_phys nilfs C 19 573d 656d 0/27 closed as dup on 2022/09/19 06:44

Sample crash report:
bcachefs (loop0): going read-write
bcachefs (loop0): done starting filesystem
------------[ cut here ]------------
virt_to_phys used for non-linear address: fffffffffffffff2 (0xfffffffffffffff2)
WARNING: CPU: 0 PID: 6287 at arch/arm64/mm/physaddr.c:15 __virt_to_phys+0xc4/0x138 arch/arm64/mm/physaddr.c:12
Modules linked in:
CPU: 0 PID: 6287 Comm: syz-executor202 Not tainted 6.10.0-rc5-syzkaller-g5e456a31d1ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __virt_to_phys+0xc4/0x138 arch/arm64/mm/physaddr.c:12
lr : __virt_to_phys+0xc4/0x138 arch/arm64/mm/physaddr.c:12
sp : ffff80009af36c00
x29: ffff80009af36c00 x28: 0000000000000002 x27: 1ffff000135e6d98
x26: 1ffff000135e6d94 x25: dfff800000000000 x24: fffffffffffffff2
x23: ffff0000db557a20 x22: 000f600000000000 x21: 000000000000002d
x20: fffffffffffffff2 x19: 000ffffffffffff2 x18: 0000000000000008
x17: 6666783028203266 x16: ffff800082fca0f0 x15: 0000000000000001
x14: 1fffe000367a9e4a x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000002 x10: 0000000000ff0100 x9 : 6df737eb5149e300
x8 : 6df737eb5149e300 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80009af36358 x4 : ffff80008f295100 x3 : ffff8000805f0fe4
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
 __virt_to_phys+0xc4/0x138 arch/arm64/mm/physaddr.c:12
 virt_to_phys arch/arm64/include/asm/memory.h:368 [inline]
 virt_to_pfn arch/arm64/include/asm/memory.h:382 [inline]
 virt_to_folio include/linux/mm.h:1313 [inline]
 kfree+0x9c/0x3e0 mm/slub.c:4550
 bch2_ioctl_fsck_online+0x358/0x580 fs/bcachefs/chardev.c:853
 bch2_fs_ioctl+0x23ec/0x3980 fs/bcachefs/chardev.c:927
 bch2_fs_file_ioctl+0x78c/0x2334 fs/bcachefs/fs-ioctl.c:532
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
irq event stamp: 76418
hardirqs last  enabled at (76417): [<ffff8000803798a0>] __up_console_sem kernel/printk/printk.c:341 [inline]
hardirqs last  enabled at (76417): [<ffff8000803798a0>] __console_unlock kernel/printk/printk.c:2746 [inline]
hardirqs last  enabled at (76417): [<ffff8000803798a0>] console_unlock+0x18c/0x3d4 kernel/printk/printk.c:3065
hardirqs last disabled at (76418): [<ffff80008b06f39c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470
softirqs last  enabled at (76054): [<ffff8000800307e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (76052): [<ffff8000800307ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
Unable to handle kernel paging request at virtual address ffffffffc377ffc8
KASAN: maybe wild-memory-access in range [0x0003fffe1bbffe40-0x0003fffe1bbffe47]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001acce6000
[ffffffffc377ffc8] pgd=0000000000000000, p4d=00000001b058e003, pud=00000001b058f003, pmd=0000000000000000
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6287 Comm: syz-executor202 Tainted: G        W          6.10.0-rc5-syzkaller-g5e456a31d1ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : _compound_head include/linux/page-flags.h:245 [inline]
pc : virt_to_folio include/linux/mm.h:1315 [inline]
pc : kfree+0xb4/0x3e0 mm/slub.c:4550
lr : virt_to_phys arch/arm64/include/asm/memory.h:368 [inline]
lr : virt_to_pfn arch/arm64/include/asm/memory.h:382 [inline]
lr : virt_to_folio include/linux/mm.h:1313 [inline]
lr : kfree+0x9c/0x3e0 mm/slub.c:4550
sp : ffff80009af36c30
x29: ffff80009af36c40 x28: 0000000000000002 x27: 1ffff000135e6d98
x26: 1ffff000135e6d94 x25: dfff800000000000 x24: fffffffffffffff2
x23: ffff0000db557a20 x22: ffff0000dd64a2d0 x21: fffffffffffffff2
x20: ffffffffc377ffc0 x19: ffff800082801fec x18: 0000000000000008
x17: 6666783028203266 x16: ffff800082fca0f0 x15: 0000000000000001
x14: 1fffe000367a9e4a x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000002 x10: 0000000000ff0100 x9 : 00003e000377ffc0
x8 : ffffc1ffc0000000 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80009af36358 x4 : ffff80008f295100 x3 : ffff8000805f0fe4
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000080011dfffff2
Call trace:
 virt_to_folio include/linux/mm.h:1313 [inline]
 kfree+0xb4/0x3e0 mm/slub.c:4550
 bch2_ioctl_fsck_online+0x358/0x580 fs/bcachefs/chardev.c:853
 bch2_fs_ioctl+0x23ec/0x3980 fs/bcachefs/chardev.c:927
 bch2_fs_file_ioctl+0x78c/0x2334 fs/bcachefs/fs-ioctl.c:532
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: 927acd29 f2d83fe8 cb141929 8b080134 (f9400688) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	927acd29 	and	x9, x9, #0x3ffffffffffffc0
   4:	f2d83fe8 	movk	x8, #0xc1ff, lsl #32
   8:	cb141929 	sub	x9, x9, x20, lsl #6
   c:	8b080134 	add	x20, x9, x8
* 10:	f9400688 	ldr	x8, [x20, #8] <-- trapping instruction

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/30 10:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5e456a31d1ac 757f06b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in __virt_to_phys
2024/06/30 10:02 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 5e456a31d1ac 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __virt_to_phys
* Struck through repros no longer work on HEAD.